I NEED HELP ASAP!

Crocodile River y=4

27 is what percent of 108? 27 is % of 108

Hey am have account in but wished to create an account here you guys will me with my make new friends of uk !

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?